CN220720859U - Charging pile residual current protection device and charging pile - Google Patents
Charging pile residual current protection device and charging pile Download PDFInfo
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- CN220720859U CN220720859U CN202321740090.9U CN202321740090U CN220720859U CN 220720859 U CN220720859 U CN 220720859U CN 202321740090 U CN202321740090 U CN 202321740090U CN 220720859 U CN220720859 U CN 220720859U
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- 230000005284 excitation Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
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- 229920006395 saturated elastomer Polymers 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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Abstract
The utility model provides a charging pile residual current protection device and a charging pile, wherein the protection device comprises: the circuit breaker is connected in series on the power supply loop; the signal acquisition module is connected in series with a switch of the circuit breaker and is used for acquiring the sum of current vectors of each phase of the power supply loop to acquire residual current; the tripping device is characterized in that one end of the tripping device is connected with a coil of the circuit breaker; and the control unit is respectively connected with the signal acquisition module and the other end of the release and is used for driving the release to carry out the opening operation on the circuit breaker when the starting protection condition is judged to be reached according to the residual current. The protection device integrates the release, can control the disconnection of the circuit breaker in a mechanical way, avoids the problem that the relay cannot be disconnected in time when the coil force is small and the contact is high in current, can be mounted on a printed circuit board of various charging control systems, and can enable the system to enter a safe state more quickly by integrating the control function of the release.
Description
Technical Field
The utility model belongs to the technical field of charging piles, and particularly relates to a charging pile residual current protection device and a charging pile.
Background
Residual current refers to the vector sum of the currents of the phases (including the neutral line) in the low voltage distribution line and the current which is not zero. In popular terms, when an accident occurs on the electricity utilization side, current flows from the electrified body to the ground through the human body, so that the current in the incoming and outgoing lines of the main circuit is unequal in magnitude, and the instantaneous vector synthesis effective value of the current is called residual current and commonly called electric leakage. Therefore, in order to prevent personnel from getting an electric shock, the electrical equipment has an active protection device for protecting an electrical element in addition to an insulation protection requirement, and the residual current protector is one of the safety protection devices.
Taking the charging pile as an example, the power supply used by the charging pile for charging the electric automobile has safety threat to human body, so that a residual current protector is needed,
at present, the residual current protector of the charging pile is mainly arranged in a power supply loop by adopting standard electric components, and is installed by adopting guide rails, so that the mode has larger volume and is unfavorable for space modeling layout under the scene of the small-volume charging pile.
And part of charging piles, in particular alternating current charging piles, adopt a control panel to integrate a residual current module (on-board) and control the disconnection of a charging output loop relay, so as to realize the power-off protection of a charging loop. However, the relay is controlled by the coil to have small action force, and the contact of the relay/contactor is in a high-current working state, so that the contact is not stuck and broken. And the residual current module sends out signals, and the electrical system controls the received signals and processes the control relay to be opened, so that a time process is needed, and the time delay problem exists.
Disclosure of Invention
The utility model provides a charging pile residual current protection device for solving the technical problems.
The utility model further provides a charging pile.
The technical scheme adopted by the utility model is as follows:
the utility model provides a charging pile residual current protection device, which comprises: the circuit breaker is connected in series on the power supply loop; the signal acquisition module is connected with the switch of the circuit breaker in series and is used for acquiring the vector sum of all phases of current of the power supply loop to obtain residual current; one end of the release is connected with a coil of the circuit breaker; the control unit is respectively connected with the signal acquisition module and the other end of the release, and is used for driving the release to carry out the opening operation on the circuit breaker when judging that the starting protection condition is reached according to the residual current.
The charging pile residual current protection device provided by the utility model also has the following additional technical characteristics:
specifically, the signal acquisition module includes: the zero sequence transformer is used for collecting the vector sum of all phases of currents of the power supply loop; the signal amplifying circuit is connected with the zero sequence transformer and is used for amplifying the vector sum of the currents of each phase; and the filter circuit is connected with the signal amplifying circuit and is used for carrying out filter processing on the data amplified by the signal amplifying circuit.
Specifically, the protection device further includes: the interaction interface is connected between the control unit and the charging control system of the charging pile and is used for realizing data interaction between the control unit and the charging control system.
Further, the interaction interface includes: RS485 (a serial communication standard), CAN (Controller Area Networ, controller area network bus) and switching value.
Specifically, the protection device further comprises: the excitation circuit is respectively connected with the signal acquisition module and the control unit, and is used for simulating residual current and inputting the residual current into the signal acquisition module so as to enable the charging pile residual current protection device to perform self-checking.
Specifically, the charging pile residual current protection device is mounted on a printed circuit board of a charging control system in a manner of soldering a PCB (Printed Circuit Board ).
The utility model further provides a charging pile, which comprises the charging pile residual current protection device.
The utility model has the following beneficial effects:
the protection device integrates the release, can control the disconnection of the circuit breaker in a mechanical way, has large acting force of the control coil of the release, avoids the problem that the relay cannot be disconnected in time to cause adhesion when the high current is applied to the contact, can be mounted on the printed circuit board of various charging control systems, has compact structure, does not influence the space modeling layout of the charging pile, and integrates the control function of the release, can directly control the disconnection of the circuit breaker, has time advantage compared with the traditional board-mounted protection device, and can enable the system to enter a safe state more quickly.
Drawings
Fig. 1 is a schematic structural view of a charging pile residual current protection device according to an embodiment of the present utility model;
fig. 2 is a schematic structural view of a residual current protection device for a charging pile according to another embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The following describes a charging pile residual current protection device and a charging pile according to an embodiment of the present utility model with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a charging pile residual current protection device according to an embodiment of the present utility model, as shown in fig. 1, including: the circuit breaker 1, signal acquisition module 2, release 3 and control unit 4.
Wherein the circuit breaker 1 is connected in series with the power supply loop L; the signal acquisition module 2 is connected with a switch of the circuit breaker 1 in series, and the signal acquisition module 2 is used for acquiring the sum (including neutral wires) of current vectors of all phases of the power supply loop L to acquire residual current; one end of the release 3 is connected with a coil of the circuit breaker; the control unit 4 is respectively connected with the signal acquisition module 2 and the other end of the release 3, and the control unit 4 is used for driving the release 3 to conduct opening operation on the circuit breaker 1 when judging that the starting protection condition is reached according to the residual current.
Specifically, as shown in fig. 1, the signal acquisition module 2 acquires the sum of current vectors of each phase (including a neutral line) in the power supply loop, namely, residual current, and then sends the sum to the control unit 4, the control unit 4 uses the MCU (Microcontroller Unit, micro control unit) as a core, performs data operation by receiving the residual current sent by the signal acquisition module 2, identifies various waveform types and parameter values of the residual current, and then judges that a start protection condition is reached according to relevant national standards, and if judging that the start protection condition is reached, the control unit 4 drives the release 3 to perform a disconnection operation on the circuit breaker 1 in the power supply loop. The release 3 is a device for mechanically cooperating with the circuit breaker 1 used in an electrical system to release the holding mechanism and automatically open the circuit breaker 1. Therefore, the protection device integrates the release, the circuit breaker can be controlled to be disconnected in a mechanical mode, the acting force of the control coil of the release is large, the problem that the relay control coil is small in force and can not be disconnected in time to cause adhesion when high current is caused on the contact is avoided, the protection device can be mounted on the printed circuit board of various charging control systems, is compact in structure, does not influence the space modeling layout of the charging pile, and integrates the control function of the release, the circuit breaker is directly controlled to be disconnected, and compared with the traditional board-mounted protection device, the protection device has more time advantage, and the system can enter a safe state more quickly.
According to one embodiment of the present utility model, the signal acquisition module 2 may include: zero sequence transformer, signal amplification circuit and filter circuit. The power supply loop passes through the center of the zero sequence transformer acquisition loop, and the zero sequence transformer is used for acquiring the vector sum of all phases of current of the power supply loop; the signal amplifying circuit is connected with the zero sequence transformer and is used for amplifying the vector sum of the currents of each phase; the filter circuit is connected with the signal amplifying circuit and is used for carrying out filter processing on the data amplified by the signal amplifying circuit.
Specifically, the signal acquisition module 2 mainly comprises a zero sequence transformer, a signal amplification circuit and a filter circuit, wherein the zero sequence transformer adopts a fluxgate principle, namely, the nonlinear relation between the magnetic induction intensity and the magnetic field intensity of a high-permeability magnetic core in a measured magnetic field under the saturated excitation of an alternating magnetic field is utilized to measure a weak magnetic field. The single-phase or three-phase power supply loop passes through the center of the zero-sequence transformer acquisition loop, and the zero-sequence transformer acquires the current vector sum of each phase (including a neutral line) in the power supply loop, if the current vector sum is not zero, the residual current exists, and the power supply loop has electric leakage. The existence of a weak magnetic field in the principle of the fluxgate is caused by the fact that the current vector sum is not zero, and a weak magnetic field signal is transmitted to a control unit for operation and identification after being processed by circuits such as amplification and filtering, and whether a starting protection condition is achieved or not is judged.
According to an embodiment of the present utility model, as shown in fig. 2, the charging pile residual current protection device may further include: the interaction interface 5, the interaction interface 5 is connected between the control unit 4 and the charging control system 6 of the charging pile, and the interaction interface 5 is used for realizing data interaction between the control unit 4 and the charging control system 6. Wherein the interactive interface may include: RS485, CAN and switching value.
Specifically, the interaction interface 5 is mainly a communication interface and a switching value interface, and is connected with a charging control system of a charging pile where the communication interface and the switching value interface are located to perform data interaction, and the method comprises the steps of receiving a self-checking instruction of a main control, reporting main control residual current data and the like, so that the charging control system can timely obtain the residual current data, adopting a coping strategy before power failure after abnormal data is monitored, including operation data storage, fault reporting and the like, and is free of on-site manual testing, convenient to maintain and low in operation cost.
According to an embodiment of the present utility model, as shown in fig. 2, the charging pile residual current protection device may further include: the excitation circuit 7 is respectively connected with the signal acquisition module 2 and the control unit 4, and the excitation circuit 7 is used for simulating residual current and inputting the residual current into the signal acquisition module 2 so as to enable the charging pile residual current protection device to perform self-checking.
Specifically, when the residual current is simulated by the exciting circuit 7 to check whether the device works normally, the charging control system 6 generally informs the control unit 4 to perform self-checking through the interactive interface 5 periodically, after receiving a self-checking instruction, the exciting circuit 7 simulates the residual current and inputs the residual current into the signal acquisition module, if the control unit 4 successfully performs the disconnection operation on the circuit breaker 1 by driving the release 3, the charging pile residual current protection device is indicated to work normally, and the anti-regulation indicates that the charging pile residual current protection device is abnormal. Therefore, the abnormality of the device can be found in time, and the stability and safety of the device are ensured.
According to the charging pile residual current protection device provided by the embodiment of the utility model, the charging pile residual current protection device is arranged on a printed circuit board of a charging control system in a PCB soldering manner. Therefore, the device can be mounted on the printed circuit board of various charging control systems, has a compact structure and does not influence the space modeling layout of the charging piles.
In this novel embodiment, foretell electric pile residual current protection device that fills still includes the power, and the power is used for supplying power for whole device, and the power is mainly weak current.
In summary, according to the charging pile residual current protection device provided by the embodiment of the utility model, the release is integrated, the disconnection of the circuit breaker can be controlled in a mechanical way, the acting force of the control coil of the release is large, the problem that adhesion is caused by incapability of being disconnected in time when the relay control coil is small in force and large current is caused on the contact is avoided, the charging pile residual current protection device can be mounted on the printed circuit board of various charging control systems, the structure is compact, the space modeling layout of the charging pile is not influenced, the control function of the release is integrated, the disconnection of the circuit breaker is directly controlled, the time advantage is better than that of the traditional board-mounted protection device, and the system can be enabled to enter a safe state more quickly.
In addition, the utility model also provides a charging pile, which comprises the charging pile residual current protection device.
According to the charging pile, the tripper is integrated through the residual current protection device of the charging pile, the disconnection of the breaker can be controlled in a mechanical mode, the acting force of the control coil of the tripper is large, the problem that the relay cannot be disconnected in time to cause adhesion when the control coil force is small and the large current is caused on the contact is avoided, the charging pile can be mounted on a printed circuit board of various charging control systems, the structure is compact, the space modeling layout of the charging pile is not influenced, the control function of the tripper is integrated, the disconnection of the breaker is directly controlled, the time advantage is better than that of the traditional on-board protection device, and the system can enter a safe state more quickly.
In the description of the present utility model, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. The meaning of "a plurality of" is two or more, unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily for the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A charging pile residual current protection device, characterized by comprising:
the circuit breaker is connected in series on the power supply loop;
the signal acquisition module is connected with the switch of the circuit breaker in series and is used for acquiring the vector sum of all phases of current of the power supply loop to obtain residual current;
one end of the release is connected with a coil of the circuit breaker;
the control unit is respectively connected with the signal acquisition module and the other end of the release, and is used for driving the release to carry out the opening operation on the circuit breaker when judging that the starting protection condition is reached according to the residual current.
2. The charging pile residual current protection device according to claim 1, wherein the signal acquisition module comprises:
the zero sequence transformer passes through the center of the zero sequence transformer acquisition ring and is used for acquiring the vector sum of all phases of current of the power supply loop;
the signal amplifying circuit is connected with the zero sequence transformer and is used for amplifying the vector sum of the currents of each phase;
and the filter circuit is connected with the signal amplifying circuit and is used for carrying out filter processing on the data amplified by the signal amplifying circuit.
3. The charging pile residual current protection device according to claim 1, further comprising:
the interaction interface is connected between the control unit and the charging control system of the charging pile and is used for realizing data interaction between the control unit and the charging control system.
4. A charging pile residual current protection device according to claim 3, characterized in that the interaction interface comprises: RS485, CAN and switching value.
5. The charging pile residual current protection device according to claim 1, further comprising: the excitation circuit is respectively connected with the signal acquisition module and the control unit, and is used for simulating residual current and inputting the residual current into the signal acquisition module so as to enable the charging pile residual current protection device to perform self-checking.
6. The charging pile residual current protection device according to any one of claims 1-5, characterized in that the charging pile residual current protection device is mounted on a printed wiring board of a charging control system in a PCB soldering manner.
7. Charging pile, characterized in that it comprises a charging pile residual current protection device according to any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321740090.9U CN220720859U (en) | 2023-07-04 | 2023-07-04 | Charging pile residual current protection device and charging pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321740090.9U CN220720859U (en) | 2023-07-04 | 2023-07-04 | Charging pile residual current protection device and charging pile |
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| Publication Number | Publication Date |
|---|---|
| CN220720859U true CN220720859U (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321740090.9U Active CN220720859U (en) | 2023-07-04 | 2023-07-04 | Charging pile residual current protection device and charging pile |
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| Country | Link |
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| CN (1) | CN220720859U (en) |
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2023
- 2023-07-04 CN CN202321740090.9U patent/CN220720859U/en active Active
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